GB2390687A - Plug-in adapter for gas sampling - Google Patents
Plug-in adapter for gas sampling Download PDFInfo
- Publication number
- GB2390687A GB2390687A GB0315660A GB0315660A GB2390687A GB 2390687 A GB2390687 A GB 2390687A GB 0315660 A GB0315660 A GB 0315660A GB 0315660 A GB0315660 A GB 0315660A GB 2390687 A GB2390687 A GB 2390687A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plug
- adapter
- sensor
- gas
- gas pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005070 sampling Methods 0.000 title description 4
- 238000004868 gas analysis Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 description 35
- 238000011156 evaluation Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N2001/2285—Details of probe structures
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A device for gas analysis with a sensor (5), a metering gas pump (3) is to be improved such that the sensor (5) can be connected in a simple manner both with the suction side (7) or the pressure side (8) of the metering gas pump (3). To solve the problem, a plug-in adapter (6) is provided, which has a first measuring channel (14) in a flow connection with the sensor (5), whereby the plug-in adapter (6) can be connected with the metering gas pump (3) in two positions, in such a way that a connection piece (13) of the first measuring channel (14) is connected in a first position of the plug-in adapter (6) to the pressure side (8) and in a second position to the suction side (7) of the metering gas pump (3). Thus, the adapter allows the sensor to placed on either the suction side or the pressure side of the pump depending on the adapter position.
Description
Plug-in adapter for gas sampling The invention relates to a plug-in
adapter for gas sampling for a gas sensor.
A device for gas sampling for a gas analysis device has become known from G8 2 105 849 A. By means of a pump, gas is sucked in from the ambient atmosphere and then fed in a serial sequence to various gas sensors, with which individual gas components can be detected. The pump works in a socalled pressure operation, in which the gas is sucked in from the ambient atmosphere via a flow channel and then arrives behind the pump at the sensors. The measured gas flows away to the surroundings via a discharge pipe. The arrangement of the sensors on the pressure side of the pump is selected, because the pressure difference with respect to the surroundings is as a rule less here.
With some gases, and here in particular with low gas concentrations, there is the risk, however, that the measured gas component will be adsorbed in the pump, which is usually designed as a diaphragm pump. This effect occurs, for example, in the case of chlorine and volatile hydrocarbons.
In order to minimise contact with adsorbing materials, such as for example the pump diaphragm, the sensor is arranged in these cases in front of the pump, i.e. on the suction side.
Sensors for detecting gas components are usually used in so-
called measuring heads, in which the measurement signals are processed so that they can then be displayed either at the measuring head itself or at a central evaluation unit. The processing of the measurement signal involves a calibration and adaptation to the type of gas and measurement range. Such measuring heads, which also contain internally the metering gas pump, are normally suitable for accommodating various sensors which are inserted into the measuring head. It can thus be the case that, depending on the gas component to be detected, sensors have to be arranged either in the suction area or in the pressure area of the metering gas pump.
The problem underlying the invention is to improve a device for gas analysis in such a way that sensors can be arranged in a simple manner on the suction or pressure side of the metering gas pump.
The present invention is as claimed in the claims.
The advantage of the invention essentially consists in the fact that a plug-in adapter, which has a first measuring channel in a flow connection with the gas-sensitive area of the sensor, can be placed in two positions on the measuring head containing the metering gas pump and as a result the sensor, depending on the position of the plug-in adapter, is located either on the suction side or the pressure side of the metering gas pump.
The plug-in adapter is preferably designed as a plastic moulded part, so that all necessary connections can be jointly injected directly on the basic body.
Advantageous embodiments of the invention are claimed in the subclaims The sensor and the metering gas pump are expediently accommodated in a measuring head, whereby plug-in sockets for connection with the suction side and the pressure side as well as the gas-sensitive area of the sensor are arranged on a connection face of the measuring head, which faces towards the plug-in adapter.
The plug-in sockets of the metering gas pump and the sensor are positioned on the connection face of the measuring head in such a way that the plug-in adapter, suitable for change-over, can be placed in the two positions on the measuring head.
-- It is expedient for the plug-in adapter to have a second measuring channel, which can be connected with the plug-in socket of the metering gas pump that is not occupied by the first measuring channel. By means of the measuring channels, which are run on the outside of the plug-in adapter, it is possible to connect hoses to the plug-in adapter so that a gas sample can be sucked in and evaluated even from a remote-lying point. It is particularly advantageous to provide a touch-contact element on the measuring head, which touch-contact element detects the position of the plug-in adapter. The touch-contact element can, for example, be designed as a microswitch, which in a certain position of the plug-in adapter is closed and in another position of the plug-in adapter remains in the open position. This microswitch is connected to an evaluation and control unit of the measuring head, so that it is recognized in the measuring head whether the appropriate operating mode, such as the suction operation or the pressure operation, is set for the sensor used.
An example of embodiment of the invention is shown in the figure and explained in greater detail below, by way of example, only.
The figures show the following: Figure 1 a diagrammatic representation of a measuring device with a plug-in adapter, Figure 2 a side view of the plug-in adapter according to figure 1, Figure 3 the measuring device according to figure 1 with the plug-in adapter placed in a second position, Figure 4 a side view of the plug-in adapter according to figure 3, Figure 5 a perspective view onto the plug-in adapter.
Figure 1 shows diagrammatically a measuring device 1 for gas analysis, containing a measuring head 2 with a metering gas pump 3, a control and evaluation unit 4 and a sensor 5 inserted in measuring head 2 as well as a plug-in adapter 6. Metering gas pump 3 conveys the gas sample from a suction side 7 to a pressure side 8, whereby metering gas pump 3 can be connected with plug-in adapter 6 by means of plug-in sockets 9, 10 on a connection face 11 of measuring head 2. For this purpose,
-6- plug-in adapter 6 has connection pieces 12, 13, which can be inserted into plug-in sockets 9, 10. Pressure side 8 is connected in flow terms with a first measuring channel 14 of plug-in adapter 6, whereby first measuring channel 14 has a plug-type connection 15 for sensor 5, so that gas-sensitive area 16 of sensor 5 is in flow contact with the measuring gas.
A second measuring channel 17 is connected with suction side 7 via connection piece 12. The flow direction through plug-in adapter 6 is illustrated by arrows 18. Connection pieces 12, 13 and plug-in sockets 9, 10 are arranged symmetric to a centreline 19, so that plug-in adapter 6 can be placed onto connection face 11 of the measuring head in two positions offset through 180 degrees. By means of a touch-contact switch 25 on measuring head 2, which is connected to control and evaluation unit 4, the position of plug-in adapter 6 can be detected. For this purpose, there is provided on plug-in adapter 6 a projection 26 which activates touch-contact switch 25 when it is below touch-contact switch 25.
With the position of projection 26 shown in figure 1, touch-
contact switch 25 does not emit any signal to control and evaluation unit 4, which is interpreted as the pressure operation.
-7 Figure 2 illustrates the plug-in adapter 6 withdrawn from measuring head 2. Identical components are provided with identical reference numbers from figure 1, Measuring channels 14, 17, figure 1 run into socket sleeves 20, 21, onto which measuring gas hoses can be slipped. Symbol 22 in the middle of plug-in adapter 6 stands for pressure operation.
Figure 3 illustrates measuring head 2 with an inserted plug-in adapter 6 offset through 180 degrees compared with figure 1.
Identical components are provided with identical reference numbers from figures 1 and 2. With the mode of operation shown in figure 3, sensor 5 is located on suction side 7 of metering gas pump 3. The through-flow direction is illustrated by arrow 23. In this position of plug-in adapter 6, projection 26 activates switch 25 and evaluation and control unit 4 detects the position of plug-in adapter 6 in the suction operation.
Figure 4 illustrates plug-in adapter 6 withdrawn from measuring bead 2, whereby symbol 24 stands for the suction operation.
Figure 5 shows plug-in adapter 6 in perspective view with the places for applying arrows 18, 23 as well as symbols 22, 24.
Depending on the position of plug-in adapter 6 on measuring head 2, the user can recognise immediately by means of symbols
-8 22, 24 whether sensor 5 is exposed to measuring gas in the suction operation or in the pressure operation.
Claims (5)
1. A device for gas analysis with a sensor, a metering gas pump and with a plug-in adapter connectable with the metering gas pump and the sensor, which plug-in adapter has a first measuring channel in a flow connection with a gas-
sensitive area of the sensor, whereby the plug-in adapter can be connected in two positions with the metering gas pump, in such a way that a connection piece of the first measuring channel is connected in a first position of the plug-in adapter to the pressure side and in a second position to the suction side of the metering gas pump.
2. The device according to claim 1, characterized in that the sensor and the metering gas pump are accommodated in a measuring head and that plugin sockets for the connection with the suction side and the pressure side as well as the
-10 gas-sensitive area of the sensor are arranged on a connection face facing the plug-adapter.
3. The device according to claim 2, characterized in that the plug-in sockets and the sensor are positioned on the connection face in such a way that the plug-in adapter can be placed on the measuring head suitable for change-over.
4. The device according to any one of claims 1 to 3, characterized in that the plug-in adapter has a second measuring channel, which is designed as connectable with the plug-in socket of the metering gas pump not occupied by the first measuring channel.
5. A device for gas analysis substantially as hereinbefore described with reference to, and/or as shown in, the accompanying drawings.
5. The device according to any one of claims 1 to 4, characterized in that a touch-contact element detecting the position of the plug-in adapter is provided on the measuring head.
6. A device for gas analysis substantially as hereinbefore described with reference to, and/or as shown in, the accompanying drawings.
\' ecace's: ces: I:' Amendments to the claims have been filed as follows CLAIMS
1. A device for gas analysis with a sensor and a metering gas pump, wherein the sensor and the metering gas pump are accommodated in a measuring head, - a connection face on the measuring head, on which are arranged a first and a second plug-in socket for connection to a suction side and a pressure side of the metering gas pump, and a gas-sensitive surface of the sensor, a plug-in adapter which can be connected to the connection face and which has a first measuring channel with a connection socket that can be brought into flow connection with the gas-sensitive face of the sensor, wherein the plug-in adapter is connectable to the connection face in two positions in such a way that the connection piece is connected in a first position of the plug-in adapter by the first plugin socket to the pressure side, and in a second position by the second plug-in socket to the suction side. 2. A device according to claim 1, characterized in that the plug-in sockets and the sensor are positioned on the connection face in such a way that the plug-in adapter can be placed on the measuring head suitable for change-over.
3. A device according to claim 1 or 2, characterized in that the plug-in adapter has a second measuring channel which is designed as connectable with the plug-in socket of the metering gas pump not occupied by the first measuring channel.
* * À *
* e' ce * l' e' * * 4. A device according to one of claims 1 to 3, characterized in that a touch-contact element detecting the position of the plug-in adapter is provided on the measuring head.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10231515A DE10231515C1 (en) | 2002-07-12 | 2002-07-12 | Gas analyzer, with head including sensor and pump, has connection plane with gas sockets into which adaptor can be plugged in different orientations |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0315660D0 GB0315660D0 (en) | 2003-08-13 |
| GB2390687A true GB2390687A (en) | 2004-01-14 |
| GB2390687B GB2390687B (en) | 2004-06-23 |
Family
ID=7714763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0315660A Expired - Fee Related GB2390687B (en) | 2002-07-12 | 2003-07-03 | Plug-in adapter for gas sampling |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6701773B2 (en) |
| DE (1) | DE10231515C1 (en) |
| GB (1) | GB2390687B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007044179B3 (en) | 2007-09-15 | 2008-07-03 | Dräger Safety AG & Co. KGaA | Test adapter for use with gas measuring device, has fill level indicator provided in area of recess, and temperature indicator attached at contact surface of adapter housing, where contact surface is turned toward gas measuring device |
| KR101324538B1 (en) * | 2012-01-26 | 2013-11-08 | 주식회사 디에이텍 | A portable drunkometer |
| DE102012207892A1 (en) * | 2012-05-11 | 2013-11-14 | Veritas Ag | Angle connector for connecting a fluid sensor nozzle of a fluid sensor with a fluid line |
| WO2015057220A1 (en) * | 2013-10-16 | 2015-04-23 | Draeger Safety, Inc. | Gas detection system pump adapter |
| WO2015057221A1 (en) * | 2013-10-16 | 2015-04-23 | Draeger Safety, Inc. | Gas detection system pump adapter |
| WO2016174814A1 (en) * | 2015-04-28 | 2016-11-03 | パナソニック株式会社 | Suction pump |
| US11045800B1 (en) * | 2020-10-21 | 2021-06-29 | Lawrence Kaplan | Laboratory on location test system for accreditation of breathing air quality |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2034467A (en) * | 1978-11-08 | 1980-06-04 | Draegerwerk Ag | Equipment for use in detecting the presence of a substance in a fluid |
| GB2105849A (en) * | 1981-09-11 | 1983-03-30 | Coal Ind | Electrical gas analyser for sensing at least two gases |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3704700A1 (en) * | 1987-02-14 | 1988-08-25 | Bodenseewerk Geraetetech | HEATABLE DIAPHRAGM PUMP FOR GASES |
| DE4322272C2 (en) * | 1993-07-05 | 1997-02-06 | Knf Neuberger Gmbh | Sample gas pump |
| DE50107750D1 (en) * | 2000-04-20 | 2006-03-02 | Knf Neuberger Gmbh | SAMPLE GAS PUMP |
-
2002
- 2002-07-12 DE DE10231515A patent/DE10231515C1/en not_active Expired - Fee Related
-
2003
- 2003-04-09 US US10/410,465 patent/US6701773B2/en not_active Expired - Fee Related
- 2003-07-03 GB GB0315660A patent/GB2390687B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2034467A (en) * | 1978-11-08 | 1980-06-04 | Draegerwerk Ag | Equipment for use in detecting the presence of a substance in a fluid |
| GB2105849A (en) * | 1981-09-11 | 1983-03-30 | Coal Ind | Electrical gas analyser for sensing at least two gases |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2390687B (en) | 2004-06-23 |
| US6701773B2 (en) | 2004-03-09 |
| DE10231515C1 (en) | 2003-07-10 |
| GB0315660D0 (en) | 2003-08-13 |
| US20040007048A1 (en) | 2004-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20080703 |